R7-T1 is such a tempting droid. Both a Boost and a Target Lock in a single action? Sign me up. It doesn't always seem to work perfectly, though. There are times when a boost out of an enemy arc will also put them out of your arc. I've seen some decent things with it on Blue Ace, but that's not really that impressive.
Norra Wexley is a ship which loves a target lock, and frequently likes some sort of movement action. I get why folks run BB-8/PTL/Kyle, but it's one of those builds where the action economy always seemed a little fragile to me. Get to a turn when you can't or don't want to Barrel Roll, and then you can't PTL and clear stress. Getting both R2-D2 and Engine Upgrade is great, but incredibly expensive.
Could this be a chocolate-and-peanut butter moment? A classic PTL/Kyle build is 38 points with R7-T1, and seems like the action economy would be more robust to turns when you don't need to boost, compared to BB-8 barrel rolls. Meanwhile, when using an R7 boost to get rear arc on someone, you don't necessarily even need a focus, with your title providing a soft-focus. Is that PTL into a Jan Ors Evade (37 pts)? Maybe R7-T1 is right for an Expertise Norra instead of PTL. Opening up those hard turns, and still boosting into strong attacks seems nice. Tailgunner (38 pts) or C-3PO (39) seem like the right crew for an Expertise build.
Just to put out a full list (I'm not locked into to any particular ship and it's mostly filler to build around Norra... I think the formation aspects of the build could easily fall apart, but maybe that's an advantage in disguise, where you won't be locked into one block for the whole game):
Norra Wexley (38)
ARC-170 (29), R7-T1 (3), Expertise (4), Tail Gunner (2), Alliance Overhaul (0)
Lowhhrick (34)
Auzituck Gunship (28), Rage (1), Inspiring Recruit (1), Inspiring Recruit (1), Experimental Interface (3)
Jess Pava (28)
T-70 X-Wing (25), R2-D6 (1), Primed Thrusters (1), Integrated Astromech (0), Crack Shot (1)
~~
Has anyone experimented with this droid on Norra? I've always liked R7-T1 and the great action economy on paper, but haven't really found him to be as good in the actual geometry of a table.